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  1. ( 1 / 7)^(- 1 ) = 7. A negative exponent is defined as a reciprocal so that it fits in with the rules for exponents, one of which is: x^a * x^b = x^(a + b). x^ 1 * x^(- 1 ) = x^0 = 1 Hence x^(- 1 ) = 1 / x.

    1 Answers · Education & Reference · 15/02/2010

  2. 1 /3=0.33333... 3 x 0.3333...=0.999... 3 x ( 1 /3)= 1 Therefore: 0.999....= 1 It's just the nature of ...

    9 Answers · Education & Reference · 23/10/2007

  3. 2x^2 - 3x + 1 = (2x - 1 )(x - 1 ) Notice that the terms on the left hand side of each... on the right hand side of each bracket are the factors of 1 (that is - 1 * - 1 = 1 ) and that 2x * (- 1 ) + x * (- 1 ) = -2x - x = -3x and that...

    3 Answers · Education & Reference · 22/03/2009

  4. 1 .[( 1 +cosx)/(sinx)]=- 1 cosecx + cotx = - 1 ...............( 1 ) [ 1 /sinx = cosecx and cosx/sinx = cotx] We know that cosec^2x - cot^2x = 1 ( it is a formula) so (cosecx + Cotx)(cosecx - cotx) = 1 ..................(2) Now from ( 1 ...

    3 Answers · Education & Reference · 19/01/2011

  5. √6 / (√2) - 1 multiply top & bottom by the conjugate of the bottom: √6(√2 + 1 ) / (√2 - 1 )(√2 + 1 ) = (√12 + √6) / (2 - 1 ) = 2√3 + √6 that's it! ;)

    4 Answers · Education & Reference · 12/03/2012

  6. ...to do this addition problem is to first add the whole numbers ( 1 and 2). Next add the fractions (3/8 and 1 /4). Doing so we...

    3 Answers · Education & Reference · 05/12/2010

  7. 1 . make it = to 0 1 /4x- 1 =0 2. add 1 to both sides 1 /4x= 1 3. multiply the fraction by the reciprocal to get a whole number to both sides. (4) 1 /4x= 1 (4) 4. solve! x=4

    4 Answers · Education & Reference · 15/12/2008

  8. (( 1 /x+h)-( 1 /x))/h [(x-x-h)/(x+h)]* 1 /h -h/h(x+h) - 1 /(x+h)

    2 Answers · Education & Reference · 10/10/2012

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    16 Answers · Education & Reference · 14/03/2008

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    13 Answers · Education & Reference · 14/03/2008

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